import xlrd
import os

def open_xlsheet(file_path,sheet_index):

	if(not os.path.exists(file_path)):
	
		print 'error, no trade file for ', file_path  
		return None
		
	ws_handle = None
	wb_handle = xlrd.open_workbook(filename=file_path)                    
	ws_handle = wb_handle.sheet_by_index(sheet_index)

	return ws_handle

